Home / 20,832.78-28,749.30-11,401.95

Finding the Fourth Proportional to 20,832.78, 28,749.30 and 11,401.95

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Solution

The fourth proportional to 20,832.78, 28,749.30 and 11,401.95 is: 15,734.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.78 : 28,749.30 = 11,401.95 : x
  2. Step 2: Convert to fraction form
    20,832.78/28,749.30 = 11,401.95/x
  3. Step 3: Cross multiply
    20,832.78x = 28,749.30 × 11,401.95
  4. Step 4: Simplify right side
    20,832.78x = 327,798,081.14
  5. Step 5: Solve for x
    x = 327,798,081.14/20,832.78
  6. Step 6: Final answer
    x = 15,734.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.